Rivière· 4 segments
常陸利根川
Crosses 5 administrative regions : Itako, Kamisu, Katori, Tōnoshō, Water body
Total length
26km
Max discharge
38,2m³/s
Max Strahler
4
Segments matched
4
River geography5 admin regions · 0 communes
5 administrative regions crossed (GADM L2)
- Water bodyIbaraki · Japan10.5 kmin this dpt
- ItakoIbaraki · Japan4.5 kmin this dpt
- KamisuIbaraki · Japan3.6 kmin this dpt
- KatoriChiba · Japan0.0 kmin this dpt
- TōnoshōChiba · Japan0.0 kmin this dpt
1 intersecting protected areas
Suigo-Tsukuba
IUCN VQuasi National Park
1 page = 1 named river (aggregation of 4 HydroRIVERS v10 segments). Spatial join cached after first hit.
Species present
152 distinct species · 286 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 35 species (selected proportionally per kingdom among those with at least one documented interaction here) to keep the graph readable. Hover for details, click to explore the full ecosystem of a species.
ℹ️ The territory contains many more species than displayed and all their documented interactions: the graph is intentionally the structural skeleton (top-N species by composite local score, edges filtered by Serrano 2009 disparity filter α=0.2).
Indicateurs du tissu écologique
Tissu écologique de 常陸利根川 : 28 espèces reliées par 44 interactions GloBI sur 5 types (connectance 7.4%, filtre Serrano α=0.2). 7 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).
Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).
Hydrology (HydroRIVERS v10)
Total length
26km
Max discharge
38,2m³/s
Max Strahler
4
Segments matched
4
HydroRIVERS v1.0 (Lehner et al. 2019) aggregated by name + main_riv → 1 entity = 1 named river.